From patchwork Thu Oct 1 23:04:02 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Winkler X-Patchwork-Id: 11812597 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3AAF61668 for ; Thu, 1 Oct 2020 23:04:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1FFC5207DE for ; Thu, 1 Oct 2020 23:04:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="pjrbFFZD" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2387526AbgJAXEp (ORCPT ); Thu, 1 Oct 2020 19:04:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52764 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1733247AbgJAXES (ORCPT ); Thu, 1 Oct 2020 19:04:18 -0400 Received: from mail-yb1-xb49.google.com (mail-yb1-xb49.google.com [IPv6:2607:f8b0:4864:20::b49]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 86CA7C061787 for ; Thu, 1 Oct 2020 16:04:17 -0700 (PDT) Received: by mail-yb1-xb49.google.com with SMTP id v4so547496ybk.5 for ; Thu, 01 Oct 2020 16:04:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:in-reply-to:message-id:mime-version:references:subject :from:to:cc; bh=m3yi1dYg0De53HWOeGwrrfVixnnxwRN+NlpTXCn7/v4=; b=pjrbFFZD0pLSRUSuVnFFrgjqRDKzEK/x8htCiauoliTrkWwnUp4TIecq6X5BTfaXgC jBNikGet+GZhi759zlH6zQ9lMrphRRYaIf5jkaq9hpDcxoCSmzGQXF6Xyp9KyARGbFiF byPpkhT4jO2LMntX8dixKYwEQTN38tOWxPInrN8YuyMgvbKBk6ywvepMoQYhkzgdOqit tiVNEWXMRchwaNNTSeT9Txc/ec+rYZSqmvCB0iW24gmp5xnRgqiy0QtaYaB0RSbNQH3v ykJRmdMRcVQKn8vCEzy7TE0s+sJf4WPWcThRG4vSaVY1n4Rm3AuAMOuLVR33CthQHQHQ iQkw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=m3yi1dYg0De53HWOeGwrrfVixnnxwRN+NlpTXCn7/v4=; b=bEIb8+9D53Bg+wB1RbRWvLIYLcTajGYxVkvm/tNgLShb1DzeYvutE7tI6GD5wnJuXd FZ8LZcj5FoCp4fv8KBl8re8XPI8ua57h/a60efZbaesa+3zhJ8amB/mHkAWP5W8FEwpu uIPDbSrFIgWeaTyK+jwHYR5JETVYKx4mx0lp76qJofX7monC7xGffrDGSSuFQqiGHyDV vHBgaAygfvEWhfs44O4Xcq5RoGXaqkXFgeI/gRUHhb72n+WCOSyZ5DhcJBwXNPc4Q+cX rHIssM6xKwD7f15B1Kp9iW/9NANuFhf6IgkzgXJmozAClh5fFE6KgQehaffFtG1EjRs3 eWaA== X-Gm-Message-State: AOAM532xProImPA3zeshNzSaxvVRLCGbOCGX6By+4SYZK1fdCxXGjRK9 NNfTi+lQb8vweLwzufvnMGHIo6KL/tYo0HwrhCI8 X-Google-Smtp-Source: ABdhPJwHmgE/iATWoB38o4y2JKjfVIYGyMQoFZgm6Smr4u7Rv+N4qHoRt5R91P2XGGZO33ypTEfNj9Qmq8vOskEcpy9D Sender: "danielwinkler via sendgmr" X-Received: from danielwinkler-linux.mtv.corp.google.com ([2620:15c:202:201:f693:9fff:fef4:4e59]) (user=danielwinkler job=sendgmr) by 2002:a25:dc92:: with SMTP id y140mr14300457ybe.113.1601593456211; Thu, 01 Oct 2020 16:04:16 -0700 (PDT) Date: Thu, 1 Oct 2020 16:04:02 -0700 In-Reply-To: <20201001230403.2445035-1-danielwinkler@google.com> Message-Id: <20201001160305.v4.4.Ibedcb7af24f1c01a680de4cc8cc5a98951588393@changeid> Mime-Version: 1.0 References: <20201001230403.2445035-1-danielwinkler@google.com> X-Mailer: git-send-email 2.28.0.709.gb0816b6eb0-goog Subject: [PATCH v4 4/5] Bluetooth: Query LE tx power on startup From: Daniel Winkler To: marcel@holtmann.org Cc: linux-bluetooth@vger.kernel.org, chromeos-bluetooth-upstreaming@chromium.org, Daniel Winkler , Sonny Sasaka , "David S. Miller" , Jakub Kicinski , Johan Hedberg , linux-kernel@vger.kernel.org, netdev@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-bluetooth@vger.kernel.org Queries tx power via HCI_LE_Read_Transmit_Power command when the hci device is initialized, and stores resulting min/max LE power in hdev struct. If command isn't available (< BT5 support), min/max values both default to HCI_TX_POWER_INVALID. This patch is manually verified by ensuring BT5 devices correctly query and receive controller tx power range. Reviewed-by: Sonny Sasaka Signed-off-by: Daniel Winkler --- Changes in v4: None Changes in v3: None Changes in v2: None include/net/bluetooth/hci.h | 7 +++++++ include/net/bluetooth/hci_core.h | 2 ++ net/bluetooth/hci_core.c | 8 ++++++++ net/bluetooth/hci_event.c | 18 ++++++++++++++++++ 4 files changed, 35 insertions(+) diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h index c8e67042a3b14c..c1504aa3d9cfd5 100644 --- a/include/net/bluetooth/hci.h +++ b/include/net/bluetooth/hci.h @@ -1797,6 +1797,13 @@ struct hci_cp_le_set_adv_set_rand_addr { bdaddr_t bdaddr; } __packed; +#define HCI_OP_LE_READ_TRANSMIT_POWER 0x204b +struct hci_rp_le_read_transmit_power { + __u8 status; + __s8 min_le_tx_power; + __s8 max_le_tx_power; +} __packed; + #define HCI_OP_LE_READ_BUFFER_SIZE_V2 0x2060 struct hci_rp_le_read_buffer_size_v2 { __u8 status; diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h index ab168f46b6d909..9463039f85442c 100644 --- a/include/net/bluetooth/hci_core.h +++ b/include/net/bluetooth/hci_core.h @@ -381,6 +381,8 @@ struct hci_dev { __u16 def_page_timeout; __u16 def_multi_adv_rotation_duration; __u16 def_le_autoconnect_timeout; + __s8 min_le_tx_power; + __s8 max_le_tx_power; __u16 pkt_type; __u16 esco_type; diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c index 3a2332f4a9bba2..6bff1c09be3b42 100644 --- a/net/bluetooth/hci_core.c +++ b/net/bluetooth/hci_core.c @@ -741,6 +741,12 @@ static int hci_init3_req(struct hci_request *req, unsigned long opt) hci_req_add(req, HCI_OP_LE_READ_ADV_TX_POWER, 0, NULL); } + if (hdev->commands[38] & 0x80) { + /* Read LE Min/Max Tx Power*/ + hci_req_add(req, HCI_OP_LE_READ_TRANSMIT_POWER, + 0, NULL); + } + if (hdev->commands[26] & 0x40) { /* Read LE White List Size */ hci_req_add(req, HCI_OP_LE_READ_WHITE_LIST_SIZE, @@ -3654,6 +3660,8 @@ struct hci_dev *hci_alloc_dev(void) hdev->le_num_of_adv_sets = HCI_MAX_ADV_INSTANCES; hdev->def_multi_adv_rotation_duration = HCI_DEFAULT_ADV_DURATION; hdev->def_le_autoconnect_timeout = HCI_LE_AUTOCONN_TIMEOUT; + hdev->min_le_tx_power = HCI_TX_POWER_INVALID; + hdev->max_le_tx_power = HCI_TX_POWER_INVALID; hdev->rpa_timeout = HCI_DEFAULT_RPA_TIMEOUT; hdev->discov_interleaved_timeout = DISCOV_INTERLEAVED_TIMEOUT; diff --git a/net/bluetooth/hci_event.c b/net/bluetooth/hci_event.c index 4281f4ac6700d4..de51188a3dc15d 100644 --- a/net/bluetooth/hci_event.c +++ b/net/bluetooth/hci_event.c @@ -1202,6 +1202,20 @@ static void hci_cc_le_set_adv_set_random_addr(struct hci_dev *hdev, hci_dev_unlock(hdev); } +static void hci_cc_le_read_transmit_power(struct hci_dev *hdev, + struct sk_buff *skb) +{ + struct hci_rp_le_read_transmit_power *rp = (void *)skb->data; + + BT_DBG("%s status 0x%2.2x", hdev->name, rp->status); + + if (rp->status) + return; + + hdev->min_le_tx_power = rp->min_le_tx_power; + hdev->max_le_tx_power = rp->max_le_tx_power; +} + static void hci_cc_le_set_adv_enable(struct hci_dev *hdev, struct sk_buff *skb) { __u8 *sent, status = *((__u8 *) skb->data); @@ -3574,6 +3588,10 @@ static void hci_cmd_complete_evt(struct hci_dev *hdev, struct sk_buff *skb, hci_cc_le_set_adv_set_random_addr(hdev, skb); break; + case HCI_OP_LE_READ_TRANSMIT_POWER: + hci_cc_le_read_transmit_power(hdev, skb); + break; + default: BT_DBG("%s opcode 0x%4.4x", hdev->name, *opcode); break;